I Have to  add the owner change to the below Trigger that updated Last Call Result and Notes field.Now i want to change  owner to user who created/modified the activity that Triggered? 

 

this is my trigger

 

trigger StatusChangesAccount on Task (after insert,after update)
{
    List<Contact> cons = new List<Contact>();
    List<Opportunity> opps = new List<Opportunity>();
    List<Account> accs = new List<Account>();
    List<Creditor__c> creds = new List<Creditor__c>();
    for(Task t : trigger.new )
    {
        String wtid = t.whatid;
        system.debug('*** What ID : ' + wtid);
        String whid = t.whoid;
        system.debug('*** Who ID : ' + whid);
        if(whid != null)
        {
             try
             {
                 cons.add( new Contact( id = whid, Last_Call_Result__c = t.CallDisposition) );
                 system.debug('*** Contact Inserted in first IF ');
             }
             catch(Exception e){}
        }
        if(wtid != null)
        {
            
            try
            {
            creds.add(new Creditor__c(id = wtid, Last_Call_Result__c = t.CallDisposition ));
            system.debug('*** Creditor__c Inserted in first IF ');
            }
            catch(Exception e){}
            try
            {
            accs.add(new Account(id = wtid, Last_Call_Result__c = t.CallDisposition ));
            system.debug('*** Account Inserted in first IF ');
            }
            catch(Exception e){}
            
            
            
            try
            {
            opps.add(new Opportunity(id = wtid, Last_Call_Result__c = t.CallDisposition ));
            system.debug('*** Oppurtunity Inserted in first IF ');
            }
            catch(Exception e){}
        }
    }
    try{update accs;system.debug('Account Update');}catch(Exception e){}
    try{update opps;system.debug('Oppurtunity Update');}catch(Exception e){}
    try{update cons;system.debug('Contact Update');}catch(Exception e){}
    try{update creds;system.debug('Creditor Update');}catch(Exception e){}
}